以学校食堂用塑料托盘为例,用MOLDFLOW软件模拟制件在模腔内流动与保压过程,由于制件尺寸大而薄,在生产中很易由于保压不均匀而导致制件各部位体收缩不一致,从而产生严重的翘曲变形。通过对保压曲线的优化,得到了最佳的保压曲线,很大程度上减小了制件的翘曲变形量。对减小翘曲变形的保压曲线优化给予了原则上的说明,同时也说明了影响翘曲变形的各个因素之间的相互联系。 Take plastic tray in school canteens as an example, use MOLDFLOW software to simulate the flow and pressure-holding process in the mold cavity. Because the size of the workpiece is large and thin, it is easy to produce various parts of the workpiece Shrink inconsistent, resulting in serious warpage. Through the optimization of the packing curve, the best packing curve is obtained, which greatly reduces the warpage of the assembly. The optimization of the pressure-holding curve to reduce the warping deformation is given in principle, and the interconnection among the various factors that affect the warping deformation is also illustrated.